Interview Questions
Practice the exact questions companies are asking right now.
Questions
10.0k
Companies
520
Updated
08.21.2026
10.0k Questions 520 Companies08.21.2026
PLTCHK
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
_The_TaNk_
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
ChrisSenior SWE, LinkedIn
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
sleepy33
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
JakeSenior ML Engineer, Lyft
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
nuggetlord
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
CarlosFull Stack, Shopify
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
boba.tea.vibes
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
AndySWE-II, Google
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
couchpotato99
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
ShrutiData Engineer, Salesforce
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
midnightramen
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
BiancaFrontend Eng, Figma
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
tambrahm007
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
toa
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Showing 20 results
Role
Medium
Software EngineerSenior+ LockedExplain a Challenging Project, Influence, and Mentorship
Build a coherent behavioral interview narrative spanning a challenging technical project, influence without authority, and mentorship. Clarify your ow...
Behavioral & Leadership
1
0
20 people solved
Jun 15, 2026
Medium
Software EngineerNew Grad LockedCaesar Cipher with Translation-Table Optimization
This question tests practical string manipulation and modular arithmetic by requiring implementation of a classic Caesar cipher with correct case-pres...
Coding & Algorithms
2
0
13 people solved
Jun 15, 2026
Medium
Data ScientistInternWhich Dice Game Wins More Often: One Six in 4 Rolls, or Double Sixes in 24 Rolls?
You are offered two dice games and asked to decide which one gives you a better chance of winning. - Game 1: Roll one fair six-sided die 4 times. You ...
Software Engineering Fundamentals
7
0
58 people solved
Aug 28, 2025
Medium
Machine Learning Engineer LockedCompare NLP tokenization and LLM recommendations
This question evaluates a candidate's understanding of NLP tokenization approaches and the ability to design LLM-based recommendation components, asse...
Machine Learning
24
0
206 people solved
Feb 8, 2026
Medium
Backend EngineerSenior+ LockedDesign a Train Ticket Booking System
This question evaluates a backend engineer's competency in object-oriented design, SOLID principles, API and service design, data modeling, concurrenc...
Software Engineering Fundamentals
3
0
25 people solved
May 20, 2026
Hard
Software EngineerNew GradImplement and Defend a Generic C++ Stack
Implement and Defend a Generic C++ Stack Implement a dynamically growing generic stack in C++ and then defend its object-lifetime and call-semantics c...
Software Engineering Fundamentals
3
0
26 people solved
Oct 7, 2025
Medium
Data ScientistWrite SQL window functions for D7 retention
Assume you have the following tables (timestamps are in UTC). 1) game_sessions - user_id (STRING) - session_start_ts (TIMESTAMP) - country (STRING) Ea...
Data Manipulation (SQL/Python)
11
1
162 people solved
Nov 4, 2025
Easy
Data ScientistDescribe a challenging project and how you succeeded
Behavioral prompts Answer the following using a structured format (e.g., STAR: Situation, Task, Action, Result), focusing on your contributions, trade...
Behavioral & Leadership
6
0
76 people solved
Feb 7, 2026
Medium
Software EngineerGroup words that map to same phone digits
Problem On a classic phone keypad (T9), letters map to digits: - 2: ABC, 3: DEF, 4: GHI, 5: JKL, - 6: MNO, 7: PQRS, 8: TUV, 9: WXYZ Given a list of lo...
Coding & Algorithms
10
0
146 people solved
Oct 20, 2025
Hard
Software EngineerWhiteboard and Deep Dive a Past Project
System Design: End-to-End Architecture Walkthrough Prompt Whiteboard the end-to-end architecture of a complex, user-facing system you led. Cover: 1. M...
System Design
9
0
108 people solved
Aug 13, 2025
Medium
Machine Learning EngineerSenior+ LockedImplement Gradient Descent Regression
This question evaluates understanding of linear regression and gradient-based optimization, including loss formulation, gradient derivation, parameter...
Machine Learning
3
0
62 people solved
Feb 7, 2026
Medium
Software Engineer LockedImplement matrix transforms and discuss eigenvalues
This question evaluates understanding of matrix manipulation and numerical linear algebra, including in-place matrix transforms and rotations, sparse ...
Software Engineering Fundamentals
4
0
58 people solved
Feb 7, 2026
Medium
Software EngineerImplement an Extensible Chatbot App
Implement a ChatApp class that processes user messages and routes them to bot responders. The system must support multiple bot types, and the design m...
Software Engineering Fundamentals
23
0
351 people solved
Apr 26, 2026
Medium
Software EngineerDesign scalable worker pool for template jobs
You have implemented a function that takes a template string (or many template strings) and replaces placeholders like {{db_host}} and {{db_port}} usi...
System Design
9
0
158 people solved
Oct 5, 2025
Hard
Software EngineerDescribe Helping an Underperforming Peer
Answer the following behavioral interview questions: 1. Tell me about a time when you helped a peer or teammate who was underperforming. 2. Tell me ab...
Behavioral & Leadership
3
0
42 people solved
Jan 20, 2026
Medium
Data Scientist LockedInvestigate MAU Drop and Test Coupons
This question evaluates a data scientist's competency in product analytics, causal inference, experimentation design, metric decomposition, user segme...
Analytics & Experimentation
6
0
101 people solved
Jan 20, 2026
Medium
Data EngineerWrite SQL for first share and closest collaborator
You are given event data about users viewing design files. Assume the following tables: - files(file_id, creator_id) - creator_id is a VARCHAR user ...
Coding & Algorithms
35
0
296 people solved
Jan 20, 2026
Hard
Software EngineerDesign ads frequency capping service
Design an Ads Frequency Capping Service Context You are designing a service that ensures a user does not see the same ad creative or campaign more tha...
System Design
38
0
588 people solved
Jul 17, 2025
Medium
Software EngineerConvert stack samples to trace events
Question Implement convertToTrace(samples) that, given a chronologically ordered vector of stack samples (each sample contains a timestamp and a call-...
Coding & Algorithms
182
2
692 people solved
Jul 29, 2025
Medium
Software EngineerDesign cloud storage system
Design cloud storage system In-Memory Cloud Storage: Design and Implement You are asked to design and implement an in-memory cloud storage system that...
System Design
70
0
231 people solved
Jul 29, 2025